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Re: Force ret to be at the end of a function

From: Andrew Haley <aph at redhat dot com>
To: "Wei Qin" <weiqin at gmail dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Fri, 6 Apr 2007 11:05:38 +0100
Subject: Re: Force ret to be at the end of a function
References: <1584f04c0704051948g2e1b2aa1v6a4cc8208bc0fd98@mail.gmail.com>

Wei Qin writes:

 > I notice that gcc sometimes places the "ret" instruction in the middle
 > of a function, or sometimes emits multiple "ret" instructions for a
 > function. For some reason, I wish that my gcc emits only one  "ret" at
 > the end of a function. Is there a gcc switch to force that without
 > disabling optimization?

There is no standard option.  There are several passes that reorder
basic blocks.  You'd have to find them all and disable them
individually.

Andrew.

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Follow-Ups:
- Re: Force ret to be at the end of a function
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References:
- Force ret to be at the end of a function
  - From: Wei Qin

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